This technical supplement to the final impact report of the Child Support Noncustodial Parent Employment Demonstration (CSPED) provides detailed information about the CSPED evaluation design, its data sources and analytic methods, and the construction of outcome variables. CSPED was an eight-state demonstration of child-support–led employment programs for noncustodial parents who are behind in their child support. It was sponsored by the Office of Child Support Enforcement at the Administration for Children and Families and operated from 2012 to 2017. The aim of these programs was to provide a package of services that would enable noncustodial parents to be more financially and emotionally involved in their children’s lives. Services included enhanced child support services, case management, employment services, and parenting classes. This work was conducted in partnership with the Institute for Research on Poverty at the University of Wisconsin, with funding from the Office of Child Support Enforcement at the Administration for Children and Families, U.S. Department of Health and Human Services.